Bobbin or yarn support



Patented Dec. 21, 1943 BOBBIN OR. YARN SUPPORT Harald L. Amrhein, Woonsocket, R. I., assig'nor to American Paper Tube C'o., Woonsocket, R. I., a corporation of Rhode Island Application July 9, 1943, Serial No. 494,021

8 Claims.

This invention relates to improvements in bobbins or yarn-supporting cores for use in the shuttles of looms.

One object of the present invention is to provide a bobbin or yarn-support having a smooth exterior surface not subject to splitting, splintering or becoming dented or roughened and more durable in use than the common wooden bobbins employed with loom-shuttles.

Another object is to provide a bobbin of the type indicated comprising a paper or ber tubular barrel and a molded plastic head rigidly secured thereto.

Another object is to provide a bobbin of the type indicated embodying a plastic head at its end secured against either rotary r longitudinal movement relatively of the barrel.

Another object is to provide a bobbin of the type indicated having a metal ferrule enclosing the end of the barrel and head to provide a smooth finished surface resistant to wear.

Another object is to provide a bobbin of the type indicated in which the ferrule is rigidly attached to the barrel and head to prevent relative movement therebetween.

Another object is to provide a head for a bobbin of the type indicated having holding rings on its periphery so constructed and mounted as to prevent their turning thereon.

Another object is to provide a bobbin of the type indicated which is of light weight, simple construction and economical to manufacture.

Further objects of the invention are set forth in the following specification which describes a preferred form of construction of the bobbin, by way of example, as illustrated by the accompanying drawing. In the drawing:

Fig. 1 is a longitudinal view of a bobbin incorporating the novel features of the present invention and showing the tapered form of the paper tube forming the barrel and the molded plastic head rigidly attached to one end thereof;

Fig. 2 is a part-sectional view of the end of 'the bobbin showing the cooperating tapered faces on the tube and head and the metal ferrule for sheathing the end of the bobbin and attaching the head to the tube;

Fig. 3 is a transverse sectional view on line 3-3 of Fig. 2 showing one of the split rings on the head and the stop or detent between ends of the ring for preventing it from turning on the head;

Fig. 4 is a part-sectional view of the butt end of the lbobbin showing a modified form of head in which the rings are molded thereinto; and

Fig. 5 is a transverse sectional view on line 5-.5

of Fig. 4 showing the recesses on the interior oi the rings into which the molded plastic of the head projects to lock the rings against turning on the head.

The present invention relates generally to bobbins on which weft or filling yarn is wound for use in the shuttles of looms. The present irnproved bobbin comprises a barrel constituted by a tube of fibrous material having a head at one end formed of molded plastic. A metal ferrule sheathes the end of the bobbin and engages with the head and tube to prevent relative rotary and longitudinal movement therebetween. Mounted on the periphery of the head are holding rings for engagement with the clamping jaws in the loomshuttle and the rings and head are so constructed as to prevent relative movement therebetween.

Referring to Figs. l to 3 of the drawing, the bobbin comprises a ber or paper tube 2 having a frusto-conical flange 3 ared outwardly at one end. The tube 2 may be of any suitable shape and in the form shown it is tapered longitudinally with the conical flange 3 liaring outwardly at its butt end. The tube 2 may be composed of paper or similar brous material such as molded or pressed pulp. For example, the tube 2 may be constructed by winding or wrapping a paper or ber sheet or sheets around a mandrel of suitable form with the superimposed layers cemented together with an adhesive. The conical flange 3 at the butt end of the tube 2 may be formed as the sheet material is wound on the mandrel or it may be produced after the tube has been completed by expanding its end to conical shape. As shown most clearly in Fig. 2, the outer peripheral faceof the flange 3 is of true conical form while its inner face may be slightly rounded.

The head 5 is in the form of an annulus or sleeve surrounding the butt end of the tube 2 and preferably composed of a suitable thermosetting plastic molded to the desired shape and size. The head 5 has a conical counterbore 6 at its end engaging the conical flange 3 on the tube 2 to prevent its rearward movement therealong and a series of longitudinally-extending ribs l on its inner periphery which are indented into the peripheral surface of the tube 2 and interlocked therewith to prevent relative rotation therebetween. The outer periphery of the head 5 is formed with an annular recess 8 adjacent its rearward end and a plurality of longitudinallyspaced grooves 9 of semi-circular form in crosssection positioned forwardly of the recess. Each groove 9 extends throughout the greater portion of the circumference of the head 5 with an abutcent inner and outer peripheries of the tube Y 2 and head 5, respectively. The ferrule vI5 has an annular portion or sleeve I6 extending into the end of the tube 2, an annular portion I'I enclosing the rearward periphery of the head 5 and an intermediate connecting portion I8 abutting the end of the head and tube. The annular portion I5 of the ferrule I5 is staked to the tube '2 at a series of points spaced around its periphery by means of sharp prongs or projections IS which indent the tube to rigidly connect the ferrule thereto. At the forwardv end o-f the annular outer portion I 'I of the ferrule I5 is an inwardly-directed flange 29 projecting into the recess 8 in the head 5. The annular portions I 5 and I l of the ferrule I5 thus are fixedly attached respectively to the inner, periphery of the tube 2 and the outer periphery of the head 5.

The parts of the bobbin are assembled by sliding the molded plastic head 5 along the tapered paper tube 2 and forcing it rearwardly until its conical counterbore 6 engages snugly with the conical iiange 3 on the tube. The rearward movement of the head '5 on the tube 2 acts to cause its longitudinally-extending ribs I to indent and bite into the tube 2 to interlock it therewith to restrain it from turning on the tube. After the head 5 has been assembled on the tube 2 the ferrule I5 may be applied and its annular portion or sleeve I5 staked to the tube at a series of spaced points therearound by driving a pointed tool through its cylindrical wall to indent the projections i9 into the material of the tube. rThe forward end of the portion Il of the ferrule i5 is forced down into the recess 8 in the head 5 by a spinning or rolling operation to adapt the ange to xedly secure the head in position on the tube wi-th its conical counterbore S in firm engagement with the'conical ange 3 thereof. The split wire rings H may be snapped onto the head 5 either beforeV or after the head is attached to the tube 2. T he rings ii are seated in the grooves 9 in the periphery of the head 5 with their ends engaging the opposite sides of the abutments I3 to restrain them from turning on the head.

Bobbins made in accordance with the present invention comprising a paper tube 2 and a molded plastic head 5 provide a smooth exterior surface for receiving the yarn andare farsuperior to the wooden bobbins which are subject io splitting, chipping, splintering, rnarringV and otherwise rcughening to cause chafing of jthel yarn wanna` suring its usefulness for longperiodsof time;

The provision of ahead of moldedH plasticperhersen.. Such abrasione on thesurf face of a bk bin restrict the free running of the mits economical manufacture of the bobbins in large quantities with no restriction in quality as to the availability of proper materials. By providing properly spaced abutments IE! between the ends of the grooves 9 in the head 5 the gaps in the wire rings I I are located in staggered relationship around the periphery of the head so that a firm clamping engagement by the jaws in the Yshuttle is insured to at all times properly position the bobbin therein.

Figs. 4 and 5 illustrate a head 25 of modified construction having continuous holding rings 26 molded into its periphery as inserts. While the rings 25 may have other shapes, preferably they have a rounded outer cross-sectional contour 21 and a flat interior face 28 as shown in Fig. 4. The interior fiat faces 28 of the rings 26 are provided with a series of radial recesses 29 into which the plastic flows when the head 25 is molded, whereof to lock the ringsagainst turning on the head. The recesses 29 in the rings 25 may take other forms and the number of recesses may vary,r but as shown in Fig. 5 the recesses are of semi-circular shape and each ring has three recesses. Preferably, the rings 25 are arranged with the recessesl of adjacent rings spaced in staggered relationship.

With the construction of head 25 illustrated in Figs. i and 5 the flat sided rings 2E will not be embedded as deeply into the periphery of the head 5 as when rings of circular cross-section are used so that the radial thickness of the head 25 may be reduced somewhat to adapt it for tubes 2 of larger diameter. The molding of the continuous rings 25 into the periphery of the head 25 and the locking of the rings against turning thereon prevents loosening of the rings on the head so-that the bobbin always will be properly positioned in the shuttle in which it is used.

It will be observed from the foregoing specification. that the present invention provides a bobbin of improved construction which is of extremely light weight, economical to manufacture and more resistant to chipping and marring than the wooden bobbins commonly in use. It will be observed also that the metal ferrule of the present construction strengthens and reinforces the butt end of the bobbin and provides a smooth nished surface. It will be observed still further that the improved construction of the head prevents displacement of the holding rings thereon so that the bobbin invariably will be properly positioned in the loorn-shuttle with which it is used.

While two forms of construction of the irnproved bobbin are herein illustrated and described, it is to be understood that further modiications may bernade in the form and arrangement of its parts without departing from the spirit or scope of the invention. Therefore, without limiting myself in this respect, I claim:

1. A bobbin of the type indicated comprising a tubular barrelhaving an outwardly-'haring conical ilange at its end, an annular head mounted onth'e barrel and having a conical counterbore engaging the conical flange thereof, and a ferrule having an annular sleeve-portion extending into the end of the barrel and an annular outer portion surroundingrthe end of the head, said annularrpo'rtions ofthe ferrule being xedly secured to the barrel andhead enclosing the ends thereof andholding-the conical counterbore in the 'head seated ragainst the-conical flange on the barrel',

2. Atbo'bbinv of the type indicated comprisingv a ber tube havingp ari-outwardlyeflaring conical ilange, an annular head of molded plastic mounted on the, tube and having a conical counterbore engaging the conical flange thereof, and a metal ferrule having an annular sleeve-portion extending into the end of the tube and an annular outer portion surrounding the end of the head, said annular portions of the ferrule being rigidly secured to the tube and head enclosing the ends thereof and holding the conical counterbore in the head seated against the conical flange on the tube.

3. A bobbin of the type indicated comprising a tube having an outwardly-haring conical flange at one end, an annular head mounted on the tube and having a conical counterbore engaging the conical flange thereof, said head having an annular recess in its periphery, and a ferrule having an annular sleeve-portion extending into the end of the tube and an annular outer portion surrounding the end oi" the head, said annular portion of the ferrule extending into the tube being staked thereto and the annular portion surrounding the end portion of the head projecting into the annular recess in its periphery, said ferrule enclosing the end of the tube and head and holding the conical counterbore in the head seated against the conical liange on the tube.

4. A bobbin comprising a tapered tube of brous material having an outwardly-daring conical ange at one end, an annular head mounted on the tube and having a conical counterbore engaging the conical flange thereof and longitudinally-extending ribs indenting the periphery of the tube, and a ferrule having an annular portion extending into the end of the tube and an annular portion surrounding the end of the head, said annular portions of the ferrule being rigidly secured to the tube and head enclosing the ends thereof and holding the conical counterbore in the head seated against the conical flange on the tube.

5. A bobbin comprising a tube having an out- Wardly-flaring conical flange at one end, an annular head mounted on the tube and having a conical counterbore engaging the conical flange thereof, said head having a series of grooves encircling its periphery, holding rings seated in said grooves in the head, and a ferrule having an annular` portion extending into the end of the tube and an annular portion surrounding the end portion of the head, said annular portions of the ferrule being rigidly secured to the tube and head enclosing the ends thereof and holding the conical counterbore on the head seated against the conical ange on the tube.

6. A bobbin comprising a tapered tube of iibrous material having an outwardly-flaring conical flange at its butt end, an annular head mounted on the tube and having a conical counterbore engaging the conical flange thereof, said head having a series of circumferential recesses in its periphery and longitudinally-extending ribs on its interior indenting the periphery of the tube, a ferrule having an annular portion extending into the end of the tube and an annular portion surrounding the end of the head, said annular portion of the ferrule extending into the tube being staked thereto to secure it in position and the annular portion surrounding the end of the head formed to engage in one of the recesses in its periphery enclosing the end of the tube and head and holding the conical counterbore of the head seated against the conical iiange on the tube, and holding rings seated in the other recesses in the head.

7. A bobbin oi the type indicated comprising a barrel having an enlarged head at one end, said head having a plurality of peripheral grooves With an abutment in each groove, the abutments in the plurality of grooves being oiTset angularly With respect to each other, and split rings seated in the grooves with their ends engaging the opposite sides of the abutments to prevent turning of the rings on the head.

8. A bobbin of the type indicated comprising a barrel having an enlarged head of molded plastic at one end, and metal rings molded into the plastic and projecting radially from the periphery of the head, said rings having recesses in their inner peripheries into which the molded plastic of the head projects to lock the rings against turning on the head.

HARALD L. AMRHEIN. 

